Improvement in clutches for machinery



F. G. BATES.'

Improvement in Clutch for Machinery.

Patented March,12, 1872.

fly. i.

UNITED STATES PATENT OFFICE FRANCIS Gr. BATES, OF SPRINGFIELD,MASSACHUSETTS, ASSIGNOR TO HIM- SELF, PETER FERGUSON, OF NEW HAVENCOUNTY, AND RUFUS BAKER,

OF MIDDLETOWN, CONNECTICUT.

IMPROVEMENT IN CLUTCHES FOR MACHINERY.

Specification forming part of Letters Patent No. 124,476, dated March12, 1872.

To all whom it may concern:

Be it known that I, FRANCIS G. BATES, of Springfield, in the county ofHampden and State of Massachusetts, have invented a new Improvement inMachinery-Clutch; and I do hereby declare thefollowin g, when taken inconnectionwith the accompanying drawing and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawing constitutes part of this specieation, andrepresents, in-

Figure 1, a side view; Fig. 2, a section on line z z,- and in Fig. 3, asection on line a'.

This invention relates to an improvementin the machin ery-clutch forwhich application was iiled December 15, 1871, by Peter Ferguson andmyself, and which said application was allowed December 19, 1871, thesaid Ferguson being one of the assignees in this application. In thatclutch the friction device or clutch operates in but one direction-thatis, revolving' in one direction the rim is engaged with thefriction-ring, and in the other direction is free; hence that clutch canbe applied only to one positionthat is, either a right or left hand, asthe case may be.

The object of this invention is the construction of a clutch, on similarprinciples, which will engage in either direction, and it consists incombining with the divided ring within a rim a pair of levers, opcnin gin opposite directions to expand the ring, so that one lever operates inone direction, and the other in the other, but both at the same time.

A is the rim, within which the divided ring B is arranged, hererepresented as a loose pulley on a shaft, C.4 The ring B is set onto aplate, D, in substantially the same manner as before. In the division ofthe ring two levers, a d, are arranged, and between these a wedge-shapedslide, a, is thrown, as seen in Fig. 3, to open the two levers, whichopening,

expands the divided ring B, causing it to engage with the rim A, withinwhich it is placed, so that the two will revolve together in eitherdirection. To release the ring and rim from such engagement, withdrawthe arm n, and to insure its disengagement, Iprefer to employ a spring,f, to close the levers after the withdrawal ofthe arm.

As stated in our former specification before referred to, this device isapplicable to many purposes, particularly to loose pulleys running inpairs in opposite directions, as for screwcutting purposes, or as abrake for revolving Wheels.

I claim as my invention- In combination with the divided ring B,arranged within the rim A, the two levers' a d,

provided with a mechanism for opening and closing the said levers toexpand or contract the rin g, substantially as specified.

FRANCIS G. BATES.

W'itnesses J. M. STEBBINs, R. V. CROLEY.

